Improvement in mechanical movements



W LOREY Mechanical-Movement.

No. 215,378. Patented May 13, 1879.

N.PE|ER& PHOTO-LITHOGRAHER, WASHINGTON. D C.

UNITED STATES PATENT CF'FIGE.

WILLIAM LOREY, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT lN MECHANICAL MOVEMENTS.

Specification forming part of Letters Patent No. 215,378, dated May 13, 1879; application filed April 15, 1879.

lowing specification and accompanying drawin gs, in which- Figure 1 is a side elevation of the movement embodying my invention. Fig. 2 is a face view thereof. Fig. 3 is a section in line at m, Fig. 5. Fig. 4 is a section in line 3 3 Fig. 5. Fig. 5 is a section in line 2 2, Fig. 3. Fig. 6 is a view of the interior, certain parts being removed.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists of a pawl-and-ratchet mechanism so constructed that the wheel whichcarries the same may be coupled to the supporting-shaft, the power whereof is transmitted elsewhere, and uncoupled therefrom in order to render the shaft inoperative.

For this purpose I employ a star-wheel, which is provided witha shifting head or disk, the operation whereof will be hereinafter fully set forth.

Referring to the drawings, A represents a cylindrical casing or wheel, which is formed of separate parts a a, the part a being fitted loosely on the shaft B, and the part a firmly secured thereto.

0n the inner face of the periphery of the part a there are ratchet-teeth b, which correspond in number with the teeth of a toothed or star wheel, O,which is fitted loosely on the shaft B between the parts a c of the wheel A, and is of less diameter than said wheel.

Secured to or formed with the back of the wheel 0 is a head or disk D, which is formed with lugs c projecting from its periphery at opposite places, and on the inner face of the side of the part a of the wheel A is a cavity, E, which is of circular form, to receive the disk D, and extended, as at d, at opposite places to form shoulders e. The lugs 0 enter said extensions, and are adapted to abut against the shoulders c.

The width of the extensions d is greater than that of the lugs 0, whereby the latter are permitted to play a limited extent in said extensions d.

On the inner face of the part c of the wheel A are guides f, between which is fitted a pawl, F, whose heel is adapted to ride over the teeth of the star-wheel O, and whose nose is adapted to ride over the ratchetteeth 6.

In the side of the part c is an elongated opening, h, and in the wheel 0 is an opening, h, for the attachment of a lever or crank, G, to said wheels 0 when required.

The operation is as follows: The star-wheel is the driver, and it is operated by a gearwheel or other means connected to a proper part of the apparatus to which the device is applied, or by the crank or lever G inserted in the opening h.

The relation of the teeth of the wheel 0, ratchet-teeth b, and pawl F is such that when the star-wheel O is rotated in one direction the pawl is forced against a shoulder of one of the ratchet-teeth 1), whereby the several parts are coupled and move as one, the shaft B being thereby rotated, and communicating its power to any desired object-such, for instance, as the rotary cutter of a lawn-mower, the shaft of a sewing-machine, 810.

Should the star-wheel C be run in the opposite direction, the disk D shifts, bringing the lugs 0 against the respective shoulders c, and so disposing the teeth of said wheel 0 that the pawl F will beforced in andout thereby, and

ride freely over the ratchet-teeth 1) without binding or engagement therewith, whereby no motion is imparted to the shaft B.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The ratchet-wheel A a a, shaft 13, starwheel 0, and pawl F, combined and operating substantially'as and for the purpose set forth.

2. The star-wheel O, with a head or disk, D, provided with lugs c, and the wheel A, having the cavity E d, substantially as and for the purpose set forth.

3. The wheel A, fitted on the shaft B, andformed of the separate parts a a, the part at having ratchet-teeth b, in combination with the star-wheel 0, head D, and pawl F, substantially as and for the purpose set forth.

WILLIAM LOREY.

Witnesses:

JOHN A. WmpERsHEIM, H. E. GARsED. 

